Truck has sat in driveway for about 3 months, and that's not usual, and normally will fire up with no problem. But, the batteries were getting old, so this time it sounded like and a check of them verified that we needed new batteries.

It was late and dark, and one of us hooked one of the batteries uo backwards. So, now it doesn't, and sounds like there's no fire.

Can you tell me what fuses and relays to check, and maybe a systematic trouble shooting plan?

Thank You,

Ted

. Check all under hood and under dash fuses with a test light or multimeter. Be very thorough.

. Focus on damage to the PCM and alternator.

Specifically, Ted, what did you not find helpful?